Welcome to the Mustangworks Jim!
I'll give my answer to 1&2 together.
The best shop manual is the original FoMoCo manual. You can get a copy from a place I like to use for parts
http://www.musclecarparts.com/paddock/
The Chiltons manual is good too and much less expensive.
There are other classic mustang bulletin boards,
the competition 
.
http://www.mustangsandmore.com/cgi-bin/Ultimate.cgi
http://forums.stangnet.com/
and if this isn't enough to keep you busy check out this site.
http://www.courtave.net/~tschmidt/nomusic.html
Let me say you are a lucky man to get a mustang from your wife for fathers day. Does she have a sister?
-JON